gst/law/: Compulsive clean-ups: use boilerplate macros, add debug categories, fix up things to conform to symbol nome...

Original commit message from CVS:
* gst/law/alaw-decode.c:
* gst/law/alaw-decode.h:
* gst/law/alaw-encode.c:
* gst/law/alaw-encode.h:
* gst/law/alaw.c:
* gst/law/mulaw-conversion.h:
Compulsive clean-ups: use boilerplate macros, add debug
categories, fix up things to conform to symbol nomenklatura,
etc.

6 files changed, 157 insertions, 189 deletions

diff --git a/gst/law/alaw-decode.c b/gst/law/alaw-decode.c
index 4e24102d..ea84fcba 100644
--- a/gst/law/alaw-decode.c
+++ b/gst/law/alaw-decode.c
@@ -1,7 +1,5 @@
-/* GStreamer
- * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
- * PCM - A-Law conversion
- *   Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+/* GStreamer A-Law to PCM conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -22,34 +20,20 @@
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
-#include <gst/gst.h>
+
 #include "alaw-decode.h"
 
-extern GstPadTemplate *alawdec_src_template, *alawdec_sink_template;
+extern GstPadTemplate *alawdec_src_template;
+extern GstPadTemplate *alawdec_sink_template;
 
-/* Stereo signals and args */
-enum
-{
-  /* FILL ME */
-  LAST_SIGNAL
-};
+GST_DEBUG_CATEGORY_STATIC (alaw_dec_debug);
+#define GST_CAT_DEFAULT alaw_dec_debug
 
-enum
-{
-  ARG_0
-};
-
-static void gst_alawdec_class_init (GstALawDecClass * klass);
-static void gst_alawdec_base_init (GstALawDecClass * klass);
-static void gst_alawdec_init (GstALawDec * alawdec);
 static GstStateChangeReturn
-gst_alawdec_change_state (GstElement * element, GstStateChange transition);
-
-static GstFlowReturn gst_alawdec_chain (GstPad * pad, GstBuffer * buffer);
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition);
+static GstFlowReturn gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer);
 
-static GstElementClass *parent_class = NULL;
-
-/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
+GST_BOILERPLATE (GstALawDec, gst_alaw_dec, GstElement, GST_TYPE_ELEMENT);
 
 /* some day we might have defines in gstconfig.h that tell us about the
  * desired cpu/memory/binary size trade-offs */
@@ -121,14 +105,14 @@ alaw_to_s16 (guint8 a_val)
 #endif /* GST_ALAW_DEC_USE_TABLE */
 
 static gboolean
-alawdec_sink_setcaps (GstPad * pad, GstCaps * caps)
+gst_alaw_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstALawDec *alawdec;
   GstStructure *structure;
   int rate, channels;
   gboolean ret;
 
-  alawdec = GST_ALAWDEC (GST_PAD_PARENT (pad));
+  alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
 
   structure = gst_caps_get_structure (caps, 0);
   ret = gst_structure_get_int (structure, "rate", &rate);
@@ -145,65 +129,42 @@ alawdec_sink_setcaps (GstPad * pad, GstCaps * caps)
       "signed", G_TYPE_BOOLEAN, TRUE,
       "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
 
-  return TRUE;
-}
+  GST_DEBUG_OBJECT (alawdec, "rate=%d, channels=%d", rate, channels);
 
-GType
-gst_alawdec_get_type (void)
-{
-  static GType alawdec_type = 0;
-
-  if (!alawdec_type) {
-    static const GTypeInfo alawdec_info = {
-      sizeof (GstALawDecClass),
-      (GBaseInitFunc) gst_alawdec_base_init,
-      NULL,
-      (GClassInitFunc) gst_alawdec_class_init,
-      NULL,
-      NULL,
-      sizeof (GstALawDec),
-      0,
-      (GInstanceInitFunc) gst_alawdec_init,
-    };
-
-    alawdec_type =
-        g_type_register_static (GST_TYPE_ELEMENT, "GstALawDec", &alawdec_info,
-        0);
-  }
-  return alawdec_type;
+  return TRUE;
 }
 
 static void
-gst_alawdec_base_init (GstALawDecClass * klass)
+gst_alaw_dec_base_init (gpointer klass)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
-  const GstElementDetails alawdec_details =
-      GST_ELEMENT_DETAILS ("A Law audio decoder",
-      "Codec/Decoder/Audio",
-      "Convert 8bit A law to 16bit PCM",
-      "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
 
   gst_element_class_add_pad_template (element_class, alawdec_src_template);
   gst_element_class_add_pad_template (element_class, alawdec_sink_template);
-  gst_element_class_set_details (element_class, &alawdec_details);
+
+  gst_element_class_set_details_simple (element_class, "A Law audio decoder",
+      "Codec/Decoder/Audio", "Convert 8bit A law to 16bit PCM",
+      "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+
+  GST_DEBUG_CATEGORY_INIT (alaw_dec_debug, "alawdec", 0, "A Law audio decoder");
 }
 
 static void
-gst_alawdec_class_init (GstALawDecClass * klass)
+gst_alaw_dec_class_init (GstALawDecClass * klass)
 {
   GstElementClass *element_class = (GstElementClass *) klass;
 
-  parent_class = g_type_class_peek_parent (klass);
-
-  element_class->change_state = GST_DEBUG_FUNCPTR (gst_alawdec_change_state);
+  element_class->change_state = GST_DEBUG_FUNCPTR (gst_alaw_dec_change_state);
 }
 
 static void
-gst_alawdec_init (GstALawDec * alawdec)
+gst_alaw_dec_init (GstALawDec * alawdec, GstALawDecClass * klass)
 {
   alawdec->sinkpad = gst_pad_new_from_template (alawdec_sink_template, "sink");
-  gst_pad_set_setcaps_function (alawdec->sinkpad, alawdec_sink_setcaps);
-  gst_pad_set_chain_function (alawdec->sinkpad, gst_alawdec_chain);
+  gst_pad_set_setcaps_function (alawdec->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_dec_sink_setcaps));
+  gst_pad_set_chain_function (alawdec->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_dec_chain));
   gst_element_add_pad (GST_ELEMENT (alawdec), alawdec->sinkpad);
 
   alawdec->srcpad = gst_pad_new_from_template (alawdec_src_template, "src");
@@ -212,7 +173,7 @@ gst_alawdec_init (GstALawDec * alawdec)
 }
 
 static GstFlowReturn
-gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
+gst_alaw_dec_chain (GstPad * pad, GstBuffer * buffer)
 {
   GstALawDec *alawdec;
   gint16 *linear_data;
@@ -222,7 +183,13 @@ gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
   gint i;
   GstFlowReturn ret;
 
-  alawdec = GST_ALAWDEC (gst_pad_get_parent (pad));
+  alawdec = GST_ALAW_DEC (GST_PAD_PARENT (pad));
+
+  if (G_UNLIKELY (alawdec->srccaps == NULL))
+    goto not_negotiated;
+
+  GST_LOG_OBJECT (alawdec, "buffer with ts=%" GST_TIME_FORMAT,
+      GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
 
   alaw_data = GST_BUFFER_DATA (buffer);
   alaw_size = GST_BUFFER_SIZE (buffer);
@@ -241,20 +208,27 @@ gst_alawdec_chain (GstPad * pad, GstBuffer * buffer)
   for (i = 0; i < alaw_size; i++) {
     linear_data[i] = alaw_to_s16 (alaw_data[i]);
   }
-  gst_buffer_unref (buffer);
 
   ret = gst_pad_push (alawdec->srcpad, outbuf);
 
-  gst_object_unref (alawdec);
+done:
+
+  gst_buffer_unref (buffer);
 
   return ret;
+
+not_negotiated:
+  {
+    ret = GST_FLOW_NOT_NEGOTIATED;
+    goto done;
+  }
 }
 
 static GstStateChangeReturn
-gst_alawdec_change_state (GstElement * element, GstStateChange transition)
+gst_alaw_dec_change_state (GstElement * element, GstStateChange transition)
 {
   GstStateChangeReturn ret;
-  GstALawDec *dec = GST_ALAWDEC (element);
+  GstALawDec *dec = GST_ALAW_DEC (element);
 
   switch (transition) {
     default:
diff --git a/gst/law/alaw-decode.h b/gst/law/alaw-decode.h
index 108b8168..df1b8eea 100644
--- a/gst/law/alaw-decode.h
+++ b/gst/law/alaw-decode.h
@@ -1,5 +1,5 @@
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+/* GStreamer A-Law to PCM conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -17,24 +17,23 @@
  * Boston, MA 02111-1307, USA.
  */
 
-
-#ifndef __GST_ALAWDECODE_H__
-#define __GST_ALAWDECODE_H__
+#ifndef __GST_ALAW_DECODE_H__
+#define __GST_ALAW_DECODE_H__
 
 #include <gst/gst.h>
 
 G_BEGIN_DECLS
 
-#define GST_TYPE_ALAWDEC \
-  (gst_alawdec_get_type())
-#define GST_ALAWDEC(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAWDEC,GstALawDec))
-#define GST_ALAWDEC_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAWDEC,GstALawDecClass))
-#define GST_IS_ALAWDEC(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAWDEC))
-#define GST_IS_ALAWDEC_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAWDEC))
+#define GST_TYPE_ALAW_DEC \
+  (gst_alaw_dec_get_type())
+#define GST_ALAW_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAW_DEC,GstALawDec))
+#define GST_ALAW_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAW_DEC,GstALawDecClass))
+#define GST_IS_ALAW_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAW_DEC))
+#define GST_IS_ALAW_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAW_DEC))
 
 typedef struct _GstALawDec GstALawDec;
 typedef struct _GstALawDecClass GstALawDecClass;
@@ -50,8 +49,9 @@ struct _GstALawDecClass {
   GstElementClass parent_class;
 };
 
-GType gst_alawdec_get_type(void);
+GType gst_alaw_dec_get_type(void);
 
 G_END_DECLS
 
-#endif /* __GST_STEREO_H__ */
+#endif /* __GST_ALAW_DECODE_H__ */
+
diff --git a/gst/law/alaw-encode.c b/gst/law/alaw-encode.c
index 926f62b9..9b1f697c 100644
--- a/gst/law/alaw-encode.c
+++ b/gst/law/alaw-encode.c
@@ -1,7 +1,5 @@
-/* GStreamer
- * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
- * PCM - A-Law conversion
- *   Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+/* GStreamer PCM to A-Law conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -22,28 +20,18 @@
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
-#include <gst/gst.h>
+
 #include "alaw-encode.h"
 
-extern GstPadTemplate *alawenc_src_template, *alawenc_sink_template;
+GST_DEBUG_CATEGORY_STATIC (alaw_enc_debug);
+#define GST_CAT_DEFAULT alaw_enc_debug
 
-/* Stereo signals and args */
-enum
-{
-  /* FILL ME */
-  LAST_SIGNAL
-};
+extern GstPadTemplate *alawenc_src_template;
+extern GstPadTemplate *alawenc_sink_template;
 
-enum
-{
-  ARG_0
-};
-
-static void gst_alawenc_class_init (GstALawEncClass * klass);
-static void gst_alawenc_base_init (GstALawEncClass * klass);
-static void gst_alawenc_init (GstALawEnc * alawenc);
+static GstFlowReturn gst_alaw_enc_chain (GstPad * pad, GstBuffer * buffer);
 
-static GstFlowReturn gst_alawenc_chain (GstPad * pad, GstBuffer * buffer);
+GST_BOILERPLATE (GstALawEnc, gst_alaw_enc, GstElement, GST_TYPE_ELEMENT);
 
 /* some day we might have defines in gstconfig.h that tell us about the
  * desired cpu/memory/binary size trade-offs */
@@ -303,18 +291,14 @@ s16_to_alaw (gint pcm_val)
 
 #endif /* GST_ALAW_ENC_USE_TABLE */
 
-static GstElementClass *parent_class = NULL;
-
-/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
-
 static GstCaps *
-alawenc_getcaps (GstPad * pad)
+gst_alaw_enc_getcaps (GstPad * pad)
 {
   GstALawEnc *alawenc;
   GstPad *otherpad;
   GstCaps *base_caps, *othercaps;
 
-  alawenc = GST_ALAWENC (GST_PAD_PARENT (pad));
+  alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
 
   /* we can do what our template says */
   base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
@@ -362,14 +346,15 @@ alawenc_getcaps (GstPad * pad)
 }
 
 static gboolean
-alawenc_setcaps (GstPad * pad, GstCaps * caps)
+gst_alaw_enc_setcaps (GstPad * pad, GstCaps * caps)
 {
   GstALawEnc *alawenc;
   GstPad *otherpad;
   GstStructure *structure;
+  gboolean ret;
   GstCaps *base_caps;
 
-  alawenc = GST_ALAWENC (GST_PAD_PARENT (pad));
+  alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
 
   structure = gst_caps_get_structure (caps, 0);
   gst_structure_get_int (structure, "channels", &alawenc->channels);
@@ -387,71 +372,55 @@ alawenc_setcaps (GstPad * pad, GstCaps * caps)
   gst_structure_set (structure, "channels", G_TYPE_INT, alawenc->channels,
       NULL);
 
-  gst_pad_set_caps (otherpad, base_caps);
+  GST_DEBUG_OBJECT (alawenc, "rate=%d, channels=%d", alawenc->rate,
+      alawenc->channels);
 
-  gst_caps_unref (base_caps);
+  ret = gst_pad_set_caps (otherpad, base_caps);
 
-  return TRUE;
-}
+  gst_caps_unref (base_caps);
 
-GType
-gst_alawenc_get_type (void)
-{
-  static GType alawenc_type = 0;
-
-  if (!alawenc_type) {
-    static const GTypeInfo alawenc_info = {
-      sizeof (GstALawEncClass),
-      (GBaseInitFunc) gst_alawenc_base_init,
-      NULL,
-      (GClassInitFunc) gst_alawenc_class_init,
-      NULL,
-      NULL,
-      sizeof (GstALawEnc),
-      0,
-      (GInstanceInitFunc) gst_alawenc_init,
-    };
-
-    alawenc_type =
-        g_type_register_static (GST_TYPE_ELEMENT, "GstALawEnc", &alawenc_info,
-        0);
-  }
-  return alawenc_type;
+  return ret;
 }
 
 static void
-gst_alawenc_base_init (GstALawEncClass * klass)
+gst_alaw_enc_base_init (gpointer klass)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
-  const GstElementDetails alawenc_details =
-      GST_ELEMENT_DETAILS ("A Law audio encoder",
-      "Codec/Encoder/Audio",
-      "Convert 16bit PCM to 8bit A law",
-      "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
 
   gst_element_class_add_pad_template (element_class, alawenc_src_template);
   gst_element_class_add_pad_template (element_class, alawenc_sink_template);
-  gst_element_class_set_details (element_class, &alawenc_details);
+
+  gst_element_class_set_details_simple (element_class,
+      "A Law audio encoder", "Codec/Encoder/Audio",
+      "Convert 16bit PCM to 8bit A law",
+      "Zaheer Abbas Merali <zaheerabbas at merali dot org>");
+
+  GST_DEBUG_CATEGORY_INIT (alaw_enc_debug, "alawenc", 0, "A Law audio encoder");
 }
 
 static void
-gst_alawenc_class_init (GstALawEncClass * klass)
+gst_alaw_enc_class_init (GstALawEncClass * klass)
 {
-  parent_class = g_type_class_peek_parent (klass);
+  /* nothing to do here for now */
 }
 
 static void
-gst_alawenc_init (GstALawEnc * alawenc)
+gst_alaw_enc_init (GstALawEnc * alawenc, GstALawEncClass * klass)
 {
   alawenc->sinkpad = gst_pad_new_from_template (alawenc_sink_template, "sink");
-  gst_pad_set_setcaps_function (alawenc->sinkpad, alawenc_setcaps);
-  gst_pad_set_getcaps_function (alawenc->sinkpad, alawenc_getcaps);
-  gst_pad_set_chain_function (alawenc->sinkpad, gst_alawenc_chain);
+  gst_pad_set_setcaps_function (alawenc->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_enc_setcaps));
+  gst_pad_set_getcaps_function (alawenc->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_enc_getcaps));
+  gst_pad_set_chain_function (alawenc->sinkpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_enc_chain));
   gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->sinkpad);
 
   alawenc->srcpad = gst_pad_new_from_template (alawenc_src_template, "src");
-  gst_pad_set_setcaps_function (alawenc->srcpad, alawenc_setcaps);
-  gst_pad_set_getcaps_function (alawenc->srcpad, alawenc_getcaps);
+  gst_pad_set_setcaps_function (alawenc->srcpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_enc_setcaps));
+  gst_pad_set_getcaps_function (alawenc->srcpad,
+      GST_DEBUG_FUNCPTR (gst_alaw_enc_getcaps));
   gst_element_add_pad (GST_ELEMENT (alawenc), alawenc->srcpad);
 
   /* init rest */
@@ -460,7 +429,7 @@ gst_alawenc_init (GstALawEnc * alawenc)
 }
 
 static GstFlowReturn
-gst_alawenc_chain (GstPad * pad, GstBuffer * buffer)
+gst_alaw_enc_chain (GstPad * pad, GstBuffer * buffer)
 {
   GstALawEnc *alawenc;
   gint16 *linear_data;
@@ -472,9 +441,9 @@ gst_alawenc_chain (GstPad * pad, GstBuffer * buffer)
   GstFlowReturn ret;
   GstClockTime timestamp, duration;
 
-  alawenc = GST_ALAWENC (gst_pad_get_parent (pad));
+  alawenc = GST_ALAW_ENC (GST_PAD_PARENT (pad));
 
-  if (!alawenc->rate || !alawenc->channels)
+  if (G_UNLIKELY (alawenc->rate == 0 || alawenc->channels == 0))
     goto not_negotiated;
 
   linear_data = (gint16 *) GST_BUFFER_DATA (buffer);
@@ -484,7 +453,11 @@ gst_alawenc_chain (GstPad * pad, GstBuffer * buffer)
 
   timestamp = GST_BUFFER_TIMESTAMP (buffer);
   duration = GST_BUFFER_DURATION (buffer);
-  if (duration == -1) {
+
+  GST_LOG_OBJECT (alawenc, "buffer with ts=%" GST_TIME_FORMAT,
+      GST_TIME_ARGS (timestamp));
+
+  if (duration == GST_CLOCK_TIME_NONE) {
     duration = gst_util_uint64_scale_int (alaw_size,
         GST_SECOND, alawenc->rate * alawenc->channels);
   }
@@ -505,12 +478,11 @@ gst_alawenc_chain (GstPad * pad, GstBuffer * buffer)
     alaw_data[i] = s16_to_alaw (linear_data[i]);
   }
 
-  gst_buffer_unref (buffer);
-
   ret = gst_pad_push (alawenc->srcpad, outbuf);
 
 done:
-  gst_object_unref (alawenc);
+
+  gst_buffer_unref (buffer);
 
   return ret;
 
diff --git a/gst/law/alaw-encode.h b/gst/law/alaw-encode.h
index 79d01bde..3ca53a63 100644
--- a/gst/law/alaw-encode.h
+++ b/gst/law/alaw-encode.h
@@ -1,5 +1,5 @@
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+/* GStreamer PCM to A-Law conversion
+ * Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ -18,23 +18,23 @@
  */
 
 
-#ifndef __GST_ALAWENCODE_H__
-#define __GST_ALAWENCODE_H__
+#ifndef __GST_ALAW_ENCODE_H__
+#define __GST_ALAW_ENCODE_H__
 
 #include <gst/gst.h>
 
 G_BEGIN_DECLS
 
-#define GST_TYPE_ALAWENC \
-  (gst_alawenc_get_type())
-#define GST_ALAWENC(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAWENC,GstALawEnc))
-#define GST_ALAWENC_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAWENC,GstALawEncClass))
-#define GST_IS_ALAWENC(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAWENC))
-#define GST_IS_ALAWENC_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAWENC))
+#define GST_TYPE_ALAW_ENC \
+  (gst_alaw_enc_get_type())
+#define GST_ALAW_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALAW_ENC,GstALawEnc))
+#define GST_ALAW_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALAW_ENC,GstALawEncClass))
+#define GST_IS_ALAW_ENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALAW_ENC))
+#define GST_IS_ALAW_ENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALAW_ENC))
 
 typedef struct _GstALawEnc GstALawEnc;
 typedef struct _GstALawEncClass GstALawEncClass;
@@ -52,8 +52,8 @@ struct _GstALawEncClass {
   GstElementClass parent_class;
 };
 
-GType gst_alawenc_get_type(void);
+GType gst_alaw_enc_get_type(void);
 
 G_END_DECLS
 
-#endif /* __GST_STEREO_H__ */
+#endif /* __GST_ALAW_ENCODE_H__ */
diff --git a/gst/law/alaw.c b/gst/law/alaw.c
index fd481fa9..d67f857d 100644
--- a/gst/law/alaw.c
+++ b/gst/law/alaw.c
@@ -1,6 +1,25 @@
+/* GStreamer PCM/A-Law conversions
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
+
 #include "alaw-encode.h"
 #include "alaw-decode.h"
 
@@ -46,14 +65,15 @@ plugin_init (GstPlugin * plugin)
       gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, alaw_caps);
 
   if (!gst_element_register (plugin, "alawenc",
-          GST_RANK_NONE, GST_TYPE_ALAWENC) ||
+          GST_RANK_NONE, GST_TYPE_ALAW_ENC) ||
       !gst_element_register (plugin, "alawdec",
-          GST_RANK_PRIMARY, GST_TYPE_ALAWDEC))
+          GST_RANK_PRIMARY, GST_TYPE_ALAW_DEC))
     return FALSE;
 
   return TRUE;
 }
 
+/* FIXME 0.11: merge alaw and mulaw into one plugin? */
 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     "alaw",
diff --git a/gst/law/mulaw-conversion.h b/gst/law/mulaw-conversion.h
index 55180121..38367ad6 100644
--- a/gst/law/mulaw-conversion.h
+++ b/gst/law/mulaw-conversion.h
@@ -1,5 +1,5 @@
-#ifndef _GST_ULAWDECODE_H
-#define _GST_ULAWDECODE_H
+#ifndef _GST_ULAW_CONVERSION_H
+#define _GST_ULAW_CONVERSION_H
 
 #include <glib.h>
 
@@ -7,4 +7,6 @@ void
 mulaw_encode(gint16* in, guint8* out, gint numsamples);
 void
 mulaw_decode(guint8* in,gint16* out,gint numsamples);
-#endif
+
+#endif /* _GST_ULAW_CONVERSION_H */
+